<template>
  <div class="detail">
    <Header/>
    <div class="main">
      <div class="course-info">
        <div class="wrap-left">
          <video-player
              :src="mp4_url"
              :options="options"
              controls
              muted
              poster="http://127.0.0.1:8000/media/icon/default.png"
              disablePictureInPicture
          >
          </video-player>

        </div>
        <div class="wrap-right">
          <h3 class="course-name">{{ course_info.name }}</h3>
          <p class="data">
            {{ course_info.students }}人在学&nbsp;&nbsp;&nbsp;&nbsp;课程总时长：{{
              course_info.sections
            }}课时/{{ course_info.pub_sections }}小时&nbsp;&nbsp;&nbsp;&nbsp;难度：{{ course_info.level_name }}</p>
          <div class="sale-time">
            <p class="sale-type">价格 <span class="original_price">¥{{ course_info.price }}</span></p>
            <p class="expire"></p>
          </div>
          <div class="buy">
            <div class="buy-btn">
              <button class="buy-now" @click="handleGOPay">立即购买</button>
              <button class="free">免费试学</button>
            </div>
            <!--<div class="add-cart" @click="add_cart(course_info.id)">-->
            <!--<img src="@/assets/img/cart-yellow.svg" alt="">加入购物车-->
            <!--</div>-->
          </div>
        </div>
      </div>
      <div class="course-tab">
        <ul class="tab-list">
          <li :class="tabIndex==1?'active':''" @click="tabIndex=1">详情介绍</li>
          <li :class="tabIndex==2?'active':''" @click="tabIndex=2">课程章节 <span
              :class="tabIndex!=2?'free':''">(试学)</span>
          </li>
          <li :class="tabIndex==3?'active':''" @click="tabIndex=3">用户评论</li>
          <li :class="tabIndex==4?'active':''" @click="tabIndex=4">常见问题</li>
        </ul>
      </div>
      <div class="course-content">
        <div class="course-tab-list">
          <div class="tab-item" v-if="tabIndex==1">
            <div class="course-brief" v-html="course_info.brief"></div>
          </div>
          <div class="tab-item" v-if="tabIndex==2">
            <div class="tab-item-title">
              <p class="chapter">课程章节</p>
              <p class="chapter-length">共{{ course_chapters.length }}章 {{ course_info.sections }}个课时</p>
            </div>
            <div class="chapter-item" v-for="chapter in course_chapters" :key="chapter.name">
              <p class="chapter-title"><img src="../assets/img/enum.svg"
                                            alt="">第{{ chapter.chapter }}章·{{ chapter.name }}
              </p>
              <ul class="section-list">
                <li class="section-item" v-for="section in chapter.coursesections" :key="section.name">
                  <p class="name"><span class="index">{{ chapter.chapter }}-{{ section.orders }}</span>
                    {{ section.name }}<span class="free" v-if="section.free_trail">免费</span></p>
                  <p class="time">{{ section.duration }} <img src="../assets/img/chapter-player.svg"></p>
                  <button class="try" v-if="section.free_trail">立即试学</button>
                  <button class="try" v-else>立即购买</button>
                </li>
              </ul>
            </div>
          </div>
          <div class="tab-item" v-if="tabIndex==3">
            用户评论
          </div>
          <div class="tab-item" v-if="tabIndex==4">
            常见问题
          </div>
        </div>
        <div class="course-side">
          <div class="teacher-info">
            <h4 class="side-title"><span>授课老师</span></h4>
            <div class="teacher-content">
              <div class="cont1">
                <img :src="course_info.teacher.image">
                <div class="name">
                  <p class="teacher-name">{{ course_info.teacher.name }}
                    {{ course_info.teacher.title }}</p>
                  <p class="teacher-title">{{ course_info.teacher.signature }}</p>
                </div>
              </div>
              <p class="narrative">{{ course_info.teacher.brief }}</p>
            </div>
          </div>
        </div>
      </div>
    </div>
    <Footer/>
  </div>
</template>

<script setup>

//npm install video.js @videojs-player/vue --save
//https://github.com/surmon-china/videojs-player?tab=readme-ov-file#usage-vue
import Header from "../components/Header.vue"
import Footer from "../components/Footer.vue"
import {ref} from 'vue'
import {useRouter, useRoute} from 'vue-router'
import {ElMessage} from "element-plus";
import {reqCourseChapter, reqCourseDetail} from "../api/course.js";
//创建动态路由对象
let $router = useRouter()
let $route = useRoute()

const tabIndex = ref(2)  // 当前选项卡显示的下标
const course_id = ref(0) // 当前课程信息的ID
const course_info = ref({
  teacher: {},
}) // 课程信息
const course_chapters = ref([]) // 课程的章节课时列表
const options = ref({
  playbackRates: [0.7, 1.0, 1.5, 2.0], // 播放速度
  autoplay: 'any', // 如果true,浏览器准备好时开始回放。
  muted: true, // 默认情况下将会消除任何音频。
  loop: true, // 导致视频一结束就重新开始。
  preload: 'auto', // 建议浏览器在<video>加载元素后是否应该开始下载视频数据。auto浏览器选择最佳行为,立即开始加载视频（如果浏览器支持）
  language: 'zh-CN',
  aspectRatio: '16:9', // 将播放器置于流畅模式，并在计算播放器的动态大小时使用该值。值应该代表一个比例 - 用冒号分隔的两个数字（例如"16:9"或"4:3"）
  fluid: true, // 当true时，Video.js player将拥有流体大小。换句话说，它将按比例缩放以适应其容器。
  notSupportedMessage: '此视频暂无法播放，请稍后再试', // 允许覆盖Video.js无法播放媒体源时显示的默认信息。
  controls: true,
  controlBar: {
    timeDivider: true,
    durationDisplay: true,
    remainingTimeDisplay: false,
    fullscreenToggle: true // 全屏按钮
  }
})
// const mp4_url = ref('https://video.pearvideo.com/mp4/short/20240125/cont-1791495-16017396-hd.mp4')
const mp4_url = ref('http://sj7umxllc.hd-bkt.clouddn.com/10%20%E8%AF%BE%E7%A8%8B%E5%88%97%E8%A1%A8%E6%8E%A5%E5%8F%A3.mp4')


function get_course_id() {
  // 获取地址栏上面的课程ID
  course_id.value = $route.params.pk
  if (course_id.value < 1) {
    ElMessage({
      type: 'error',
      message: '视频id不存在',
      onClose: () => {
        $router.go(-1);
      }
    })


  }
}

async function get_course_data() {
  let res = await reqCourseDetail(course_id.value)
  course_info.value = res.result
}

async function get_chapter() {
  let res = await reqCourseChapter(course_id.value)
  course_chapters.value = res.results;
}


import {reqGoPay} from '../api/order.js'

async function handleGOPay() {

  let res = await reqGoPay({
    "subject": course_info.value.name,
    "total_amount": course_info.value.price,
    "pay_type": 1,
    "courses": [course_info.value.id]
  })
  open(res.pay_url, '_self');  // _self:在当前页面打开

}


get_course_id()
get_course_data()
get_chapter()


</script>

<style scoped>
.main {
  background: #fff;
  padding-top: 30px;
}

.course-info {
  width: 1200px;
  margin: 0 auto;
  overflow: hidden;
}

.wrap-left {
  float: left;
  width: 690px;
  height: 388px;
  background-color: #000;
}

.wrap-right {
  float: left;
  position: relative;
  height: 388px;
}

.course-name {
  font-size: 20px;
  color: #333;
  padding: 10px 23px;
  letter-spacing: .45px;
}

.data {
  padding-left: 23px;
  padding-right: 23px;
  padding-bottom: 16px;
  font-size: 14px;
  color: #9b9b9b;
}

.sale-time {
  width: 464px;
  background: #fa6240;
  font-size: 14px;
  color: #4a4a4a;
  padding: 10px 23px;
  overflow: hidden;
}

.sale-type {
  font-size: 16px;
  color: #fff;
  letter-spacing: .36px;
  float: left;
}

.sale-time .expire {
  font-size: 14px;
  color: #fff;
  float: right;
}

.sale-time .expire .second {
  width: 24px;
  display: inline-block;
  background: #fafafa;
  color: #5e5e5e;
  padding: 6px 0;
  text-align: center;
}

.course-price {
  background: #fff;
  font-size: 14px;
  color: #4a4a4a;
  padding: 5px 23px;
}

.discount {
  font-size: 26px;
  color: #fa6240;
  margin-left: 10px;
  display: inline-block;
  margin-bottom: -5px;
}

.original {
  font-size: 14px;
  color: #9b9b9b;
  margin-left: 10px;
  text-decoration: line-through;
}

.buy {
  width: 464px;
  padding: 0px 23px;
  position: absolute;
  left: 0;
  bottom: 20px;
  overflow: hidden;
}

.buy .buy-btn {
  float: left;
}

.buy .buy-now {
  width: 125px;
  height: 40px;
  border: 0;
  background: #ffc210;
  border-radius: 4px;
  color: #fff;
  cursor: pointer;
  margin-right: 15px;
  outline: none;
}

.buy .free {
  width: 125px;
  height: 40px;
  border-radius: 4px;
  cursor: pointer;
  margin-right: 15px;
  background: #fff;
  color: #ffc210;
  border: 1px solid #ffc210;
}

.add-cart {
  float: right;
  font-size: 14px;
  color: #ffc210;
  text-align: center;
  cursor: pointer;
  margin-top: 10px;
}

.add-cart img {
  width: 20px;
  height: 18px;
  margin-right: 7px;
  vertical-align: middle;
}

.course-tab {
  width: 100%;
  background: #fff;
  margin-bottom: 30px;
  box-shadow: 0 2px 4px 0 #f0f0f0;

}

.course-tab .tab-list {
  width: 1200px;
  margin: auto;
  color: #4a4a4a;
  overflow: hidden;
}

.tab-list li {
  float: left;
  margin-right: 15px;
  padding: 26px 20px 16px;
  font-size: 17px;
  cursor: pointer;
}

.tab-list .active {
  color: #ffc210;
  border-bottom: 2px solid #ffc210;
}

.tab-list .free {
  color: #fb7c55;
}

.course-content {
  width: 1200px;
  margin: 0 auto;
  background: #FAFAFA;
  overflow: hidden;
  padding-bottom: 40px;
}

.course-tab-list {
  width: 880px;
  height: auto;
  padding: 20px;
  background: #fff;
  float: left;
  box-sizing: border-box;
  overflow: hidden;
  position: relative;
  box-shadow: 0 2px 4px 0 #f0f0f0;
}

.tab-item {
  width: 880px;
  background: #fff;
  padding-bottom: 20px;
  box-shadow: 0 2px 4px 0 #f0f0f0;
}

.tab-item-title {
  justify-content: space-between;
  padding: 25px 20px 11px;
  border-radius: 4px;
  margin-bottom: 20px;
  border-bottom: 1px solid #333;
  border-bottom-color: rgba(51, 51, 51, .05);
  overflow: hidden;
}

.chapter {
  font-size: 17px;
  color: #4a4a4a;
  float: left;
}

.chapter-length {
  float: right;
  font-size: 14px;
  color: #9b9b9b;
  letter-spacing: .19px;
}

.chapter-title {
  font-size: 16px;
  color: #4a4a4a;
  letter-spacing: .26px;
  padding: 12px;
  background: #eee;
  border-radius: 2px;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-align: center;
  align-items: center;
}

.chapter-title img {
  width: 18px;
  height: 18px;
  margin-right: 7px;
  vertical-align: middle;
}

.section-list {
  padding: 0 20px;
}

.section-list .section-item {
  padding: 15px 20px 15px 36px;
  cursor: pointer;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.section-item .name {
  font-size: 14px;
  color: #666;
  float: left;
}

.section-item .index {
  margin-right: 5px;
}

.section-item .free {
  font-size: 12px;
  color: #fff;
  letter-spacing: .19px;
  background: #ffc210;
  border-radius: 100px;
  padding: 1px 9px;
  margin-left: 10px;
}

.section-item .time {
  font-size: 14px;
  color: #666;
  letter-spacing: .23px;
  opacity: 1;
  transition: all .15s ease-in-out;
  float: right;
}

.section-item .time img {
  width: 18px;
  height: 18px;
  margin-left: 15px;
  vertical-align: text-bottom;
}

.section-item .try {
  width: 86px;
  height: 28px;
  background: #ffc210;
  border-radius: 4px;
  font-size: 14px;
  color: #fff;
  position: absolute;
  right: 20px;
  top: 10px;
  opacity: 0;
  transition: all .2s ease-in-out;
  cursor: pointer;
  outline: none;
  border: none;
}

.section-item:hover {
  background: #fcf7ef;
  box-shadow: 0 0 0 0 #f3f3f3;
}

.section-item:hover .name {
  color: #333;
}

.section-item:hover .try {
  opacity: 1;
}

.course-side {
  width: 300px;
  height: auto;
  margin-left: 20px;
  float: right;
}

.teacher-info {
  background: #fff;
  margin-bottom: 20px;
  box-shadow: 0 2px 4px 0 #f0f0f0;
}

.side-title {
  font-weight: normal;
  font-size: 17px;
  color: #4a4a4a;
  padding: 18px 14px;
  border-bottom: 1px solid #333;
  border-bottom-color: rgba(51, 51, 51, .05);
}

.side-title span {
  display: inline-block;
  border-left: 2px solid #ffc210;
  padding-left: 12px;
}

.teacher-content {
  padding: 30px 20px;
  box-sizing: border-box;
}

.teacher-content .cont1 {
  margin-bottom: 12px;
  overflow: hidden;
}

.teacher-content .cont1 img {
  width: 54px;
  height: 54px;
  margin-right: 12px;
  float: left;
}

.teacher-content .cont1 .name {
  float: right;
}

.teacher-content .cont1 .teacher-name {
  width: 188px;
  font-size: 16px;
  color: #4a4a4a;
  padding-bottom: 4px;
}

.teacher-content .cont1 .teacher-title {
  width: 188px;
  font-size: 13px;
  color: #9b9b9b;
  white-space: nowrap;
}

.teacher-content .narrative {
  font-size: 14px;
  color: #666;
  line-height: 24px;
}
</style>